To suppress refrigerants from staying in an external heat exchange part to secure a heating capability during hot gas heating operation, before executing the hot gas heating operation, when switching heat-absorbing/heating operation to the hot gas heating operation or the like.SOLUTION: A vehicular air conditioner is provided with a refrigerant circuit, an air conditioning unit in which an indoor heat exchange part is arranged, and a control device that controls the refrigerant circuit and the air conditioning unit, where the refrigerant circuit has a hot gas bypass that decompresses at least a portion of a refrigerant compressed by a compressor and returns the portion to the compressor without going through the indoor heat exchange part and an external heat exchange part. The control device can selectively execute hot gas heating operation by which the refrigerant is prevented from absorbing heat in the external heat exchange part and heat of the portion of the refrigerant compressed by the compressor is radiated in the indoor heat exchange part to heat a vehicle interior, and heat-absorbing/heating operation by which the refrigerant is allowed to absorb heat in the external heat exchange part, which performs a refrigerant collecting process for collecting the refrigerant from the external heat exchange part, before executing the hot gas heating operation.SELECTED DRAWING: Figure 5
【課題】吸熱暖房運転からホットガス暖房運転に切り替える際等、ホットガス暖房運転を実行する前に、外部熱交換部に冷媒が滞留するのを抑制して、ホットガス暖房運転時の暖房能力確保を図る。【解決手段】車両用空調装置は、冷媒回路と、室内熱交換部を内部に配置した空調ユニットと、冷媒回路と空調ユニットを制御する制御装置と、を備え、冷媒回路は、圧縮機で圧縮した冷媒の少なくとも一部を、室内熱交換部及び外部熱交換部を経由することなく減圧して圧縮機に戻すホットガスバイパスを有し、制御装置は、外部熱交換部において冷媒に吸熱させず、圧縮機で圧縮した冷媒の一部を室内熱交換部で放熱させて車室内を暖房するホットガス暖房運転と、外部熱交換部において冷媒に吸熱させる吸熱暖房運転とを選択的に実行可能であり、ホットガス暖房運転の実行前に、外部熱交換部から冷媒を回収する冷媒回収処理を行う。【選択図】図5
VEHICULAR AIR CONDITIONER
車両用空調装置
10.05.2024
Patent
Elektronische Ressource
Japanisch
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
VEHICULAR AIR CONDITIONER AND VEHICLE HAVING VEHICULAR AIR CONDITIONER
Europäisches Patentamt | 2019
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